Cutter-guard.



P. ERICKSON.

CUTTER GUARD.

APPLICATION TILED MAR 9, 1914;

Patented Dec. 29, 1914.

2 SHEETS-SHEET 1.

P. ERIGKSON.

CUTTER GUARD.

APPLICATION FILED MAR. 9, 1914.

Patnted De0.29,1914.v I

unrrnn srn'rns PATENT, OFFICE.

PETER ERICKSON, OF CHICAGO, ILLINOIS.

., CUTTER-GUARD.

Specification of Letters Patent.

Application filed March 9, 1914. Serial No. 823,418.

To all whom it may concern:

Be it known that 1, PETER ERICKSON, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Cutter-Guards, of whichthe following is a specification.

This invention relates to improvements in guards for shapers and otherwood-working machines for preventing injury to the operator from contactwith the cutter.

It is the object of the present invention to provide a simple andefficient cutter guar which is capable of a wide range of adjustment,and to this end the invention consists in a novel combination andarrangement of parts to be hereinafter described and claimed, referencebeing had to the accompanying drawings, in which t Figure 1 is anelevation of the guard in operative position; Fig. 2 is a plan viewpartly in section, the section being onthe line 22 of Fig. 1; Fig. 3 isa section on the line 33 of Fig. 2; Fig. & is a cross-section on theline H of Fig. 1; Fig. 5 is a horizontal section on the line 5-5 of Fig.1; Fig. 6 is a cross-section on the line 6-6 of Fig.5; Fig. 7 is across-section on the line 7-7 of Fig. 2; Fig. 8 is an inverted plan viewof the cutter guard fastening shown in Fig. 7 Fig. 9 is a plan viewshowing a modified form of cutter guard, and Fig. 10 is a plan viewshowing a wrench for tightening one of the clamping bolts.

Referring specifically to the drawings, 10 denotes the work table of ashaper or other wood-working machine having a vertical cutter head 11armed with knives 12 which operate above the table in the ordinarymanner. The guard for protecting the operators hand from being injuredby the knives comprises a rod 13 which is bent into substantiallycircular shape to encircle the cutter head. The ends of the rod havedownward bends 14 carrying at their lower ends a presser plate 15. t Ontop of this plate are secured socket pieces 16 into which the lower endsof the bends 1 1 extend and are held by set screws 17. The knives arenot concealed from view by the guard as only the presser plate is infront of the knives, the rod 13 encircling the cutter head above theknives.

The guard herein described is carried by two laterally spaced,horizontal arms 18. Bolts 19 pass vertically through these arms The boltalso passes hole in the spindle27 whereby the latter s PatentedDec. 29,1914.

at their outer ends, the heads of the bolts being-beneath the arms andhaving transverse aperturesthrough which the rod 13 passes. Between thebolt heads and the under side of the arms are located washers 20 havingdepending end flanges 21 provided with apertures through which passes.The bolts project above the top of the arms and carry hand nuts 22,which latter, when tightened up, ecurely clamp the rod in place. Uponbacking the hand nuts, the rod may be shifted horizontally to place thepresser plate 15 in diflerent positions relative to the knives 12.

Fig. 9 shows a cutter guard comprising a plate 23 surrounding the cutterhead 11 and having a central opening 2 1 in which the cutter head works.This form of guard is fastened to the arms 18 by bolts 25 and thumbscrews 26. The arms are adjustable in the direction of their length topermit the exchange of guards.

Engageable with the edge of the table 10 is a support for a verticalspindle or sha t 27 carrying a holder for the arms 18. This supportcomprises a tubular member which the spindle seats and is rigidly heldby a set screw 29. The member 28 has an outstanding horizontal plate 30engaging the top of the table and made fast thereto by a bolt 31. Fromthe bottom of the member extends a stationary jaw 32 carrying clampingscrew 33 engageable with a cleat 34L on the under side of the table.Upon tightening up the bolt 31 and'the screw 33, the member 28 is table,and it can bereadily removed upon removing said bolt and slackening thescrew.

The lower end of the member 28 has outstanding flanges 34 on oppositesides. of these flanges is engaged by the hook end 35 of a bolt36, andthe other flange is engaged by a washer 37 having a groove in which saidflange seats. The bolt passes through the washer and has a hand nut 38 iadapted to be screwed against the washer. through 'atransverse reventedfrom turning.

The holder tubular member 39 which is adjustably mounted on the spindle'27. The lower end of the member has an outstanding bracket arm 10provided with grooves or seats 41 for the arms 18, said grooves being onopsecurely clamped to the One for the arms 18 comprises a posite sidesof the member so that the arms 0 ear the spindle. The arms are clampedto the bracket by a top clamping plate 42, and a bolt 43 passing throughsaid plate and that portion of the bracket which lies between the arms,said intermediate portion of the bracket having a recess 44 toaccommodate a spring 45 coiled around the bolt 43 and pressing againstthe under side of the plate 42. hen the bolt 43 is loosened, the springlifts the plate 42 to release the arms. arms 18, intermediate theirends, are also engaged by top and bottom clamping plates 46 for holdingthe same rigid.

The spindle 27 has a longitudinal groove 47, and at thetop acircumferential groove o'wer end of the line, upward on the spindle.

The member 39 has a rear enlargement 54 provided with a downwardlyinclined recess 55 in Whichis i 57 having a hooked inner end 58 adaptedto on the outer end of the key for withdrawing the latter from the A setscrew 60, threaded through the part 54, may be screwed against seatingin the spindle groove.

Upon withdrawing the key 56 from the groove 47, the member 39 may beslid upward on the spindle 27 by a pull on the line 50, and when the pin61 reaches the groove 48, the member may be rotated on the spindle. Theparts carried by the member may thus be swung horizontally across thetable to bring the guard in proper position relative to the cutter head,and the guard may also be swung entirely clear ofthe table 16, and outof the way.

It will be noted that the hooked end 58 of the lever 57 is alsocam-shaped to engage a similar shaped surface on the key 56. Thus, whenthe lever is swung upward, the

at the desiredheight.

he entire device can be removed from the table byremoving the bolt 31and backing the screw 33.

To facilitate the operation of the bolt v43, the head .63 of the same isfitted with a mping t .plate between which Wrench comprising aws 64 anda'handle or shank 65. On the bolt head is rotatably mounteda-washer 6.6which seats in a groove 67 in the jaws. The washer has a projectingfinger 68 which extends slidably into a 2. A cutter guard comprising anencircling rod having ownward ends, a presser plate carriedby said.downturned ends, S111 porting arms, headed members carried by arms and.having apertures through which .the rod passes, and means for fixing 'dmembers on the arms.

3. A cutter guard comprising .an encircling rod having downward ends, a.presser plate carried by said downturned ends, supheaded mem fllfscarried by which the arms in the apertures.

4. A cutter guard comprising an -encircling rod having downward ends ,.apresser plate carriediby said downturned ends, supporting arms, headedmembers carried by said arms and having apertures through which the ,rodpasses, washers I between said members and the arms, said washers havingend flanges provided with apertures throughwhich the rod passes, andmeans for fixing said members on the arms.

5. The combination of a cutter guard, a

4 H 'outstanding flanges on oppositesides, a washer seatingagainstoneoftheflanged sides and having a groove in which the flange seats, a boltpassing through .the memb the to a support.

6. The combination of a cutter guard, arms supporting tl1e,guard,aholder for the arms comprisinga tubular member having a bracket onopposite sides provided with grooves in which the armsseat,aclamping,plate and the bracket the arms are held, clamping means for said plate,a spindle on which the tubular memher is moun ed, a d a support fo espindle.

.7. The combination of a cutter guard,

support for the guard, at spindle on which portion engageahle with thekey for jam-, the support is mounted, said spindle having ming the sameagainstthe spindle. 10 a longitudinal groove, a key carried by the Intestimony whereof I aflix my signature support and adapted to seat inthe groove, in presence of two witnesses,

said key having a hooked outer end, and a PETER ERICKSON. L i levercarried by the support and having a Witnesses: 1 I hooked end engageablewith the hooked end S. J. LEHRER,

of the key, said lever also heving a cam H. G. BATCHELOR.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioner o1 Patents, Washing ton,D.G. I

